Looking over the current CSS3 Writing Modes spec, I'm puzzling over what
writing-mode 'horizontal-bt' is needed for? It's defined as:
"Bottom-to-top block flow. The writing mode is horizontal."
What's the script that requires this? Or is it just there for
completeness?
http://dev.w3.org/csswg/css3-writing-modes/#writing-mode
John Daggett